31145134 has 4 divisors (see below), whose sum is σ = 46717704. Its totient is φ = 15572566.

The previous prime is 31145131. The next prime is 31145137. The reversal of 31145134 is 43154113.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (31145131) and next prime (31145137).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7786282 + ... + 7786285.

It is an arithmetic number, because the mean of its divisors is an integer number (11679426).

Almost surely, 2^31145134 is an apocalyptic number.

31145134 is a deficient number, since it is larger than the sum of its proper divisors (15572570).

31145134 is a wasteful number, since it uses less digits than its factorization.

31145134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15572569.

The product of its digits is 720, while the sum is 22.

The square root of 31145134 is about 5580.7825616127. The cubic root of 31145134 is about 314.6275399518.

Adding to 31145134 its reverse (43154113), we get a palindrome (74299247).

The spelling of 31145134 in words is "thirty-one million, one hundred forty-five thousand, one hundred thirty-four".